When the equation H₂ + O₂ → H₂O is balanced using the smallest whole numbers, the coefficients of H₂, O₂ and H₂O are

Explanation

1. 01

   Oxygen: 2 atoms on the left, so 2H₂O is needed on the right.

2. 02

   Hydrogen: 2H₂O has 4 hydrogen atoms, so 2H₂ on the left: 2H₂ + O₂ → 2H₂O.